diff --git a/bundle-size/README.md b/bundle-size/README.md
index 08d43e450..542aea187 100644
--- a/bundle-size/README.md
+++ b/bundle-size/README.md
@@ -19,8 +19,8 @@ The results are:
 |------|-----:|----------|
 | esbuild (js) | 135,295 bytes | dist/js/index.js |
 | esbuild (ts) | 135,295 bytes | dist/ts/index.js |
-| parcel (js) | 1,841 bytes | dist/js/js.cf4251ac.js |
-| parcel (ts) | 1,845 bytes | dist/ts/ts.dc635180.js |
+| parcel (js) | 66,980 bytes | dist/js/js.cf4251ac.js |
+| parcel (ts) | 66,980 bytes | dist/ts/ts.dc635180.js |
 | rollup (js) | 208,546 bytes | dist/js/index.js |
 | rollup (ts) | 209,752 bytes | dist/ts/index.js |
 | vite (js) | 90,648 bytes | dist/js/consumer-vite.js |
diff --git a/bundle-size/parcel/package.json b/bundle-size/parcel/package.json
index bc9b5515d..246a16e5c 100644
--- a/bundle-size/parcel/package.json
+++ b/bundle-size/parcel/package.json
@@ -3,7 +3,9 @@
   "scripts": {
     "pregenerate": "rm -rf dist",
     "generate": "buf generate ../proto --template ../buf.gen.yaml",
-    "build": "parcel build --log-level error --no-cache --no-content-hash",
+    "build": "npm run build:js && npm run build:ts",
+    "build:js": "parcel build --log-level error --no-cache --no-content-hash --target=js",
+    "build:ts": "parcel build --log-level error --no-cache --no-content-hash --target=ts",
     "test": "npm run test:js && npm run test:ts",
     "test:js": "node dist/js/js.cf4251ac.js",
     "test:ts": "node dist/ts/ts.dc635180.js"